Apparatus for detinning tin scrap, boxes, or the like.



H. GOLDSCHIVHDT` APPARATUS FOR DETINNING TlN SCRAP, BOXES, 0R THE LIKE.

APPLlcATxoN FILED 0m24.190s.

l 9 39941, @o Patented May 11, 1915.

3 SHEETS-SHEET1.

H. GOLDSCHIVIIDT.

APPARATUS FOR DETINNING TINvSCRAP, BOXES, 0R THE LIKE.

, APPLICATION FILED DEc.24, |906.

l 9 l 3994]. Patented May 11, 1915.

3 SHEETS-SHEET 2.

H. GOLDSCHMIBT.

APPARATUS FOR DETINNING TIN SCRAP, BOXES, 0R THE LIKE. APPLICATION FILED DEC.24, 1.906. .Lp'lQl AEmma May/11,1915.

3 SHEETS-SHEET 3.

@TAS @Fl-flle@ HANS GOLDSCHMIDT, OF ESSEN-ON-THERUHR, GERMANY, ASSIGNOR, BY MESNE ASSIGNMENTS, TO GOLDSCHMIDT DETINNING COMPANY, 0F NEW YORK, N. Y.,

A CORPORATION OF NEW JERSEY.

APPARATUS FOR DETINNING TIN SCRAP, BOXES, 0R THE UKE.

Application filed December 24, 1906.

rl`in Scraps, Boxes, or the like, of which the following is an exact specification.

lt is the purpose otl my invention to detin tinned scraps of all kinds also old tin boXes and similar mattei' in an alkaline bath by mcans ot' an electric current, where the tinned scraps are packed in a certain number ot' baskets, the baskets being made of perforated sheets or screens and, in so far as concerns the capacity ot' containing Within themselves the material to be detinned, closed on all sides. They are fastened to an endless band or chain, the lower part of which with the number'otl baskets attached to it is carried through an electrolyzing bath. ln combination with this endless band and with the baskets tiXed to it an arrangement is provided to have the cathodes attached to a rotating endless band also, and carry. them in a like manner through the electrolyzing bath, instead of being arranged in single stationary plates as is common.

As a matter of course the endless band or chain which holds the baskets has to be properly insulated and connected withthe positive pole ot' the dynamo, whereas the cathodes either directly or by means of the slideor guider-ail are connected with the negative pole ot' the machine.

In order to inake my invention better understood l have illustrated the same by drawings, in which:

Figure l shows a sectional side-View7 of a constructional form of the apparatus, Fig. 2 represents a longitudinal section of the saine apparatus on the line apc, Fig. l, and Fig. 3 is a similar view on the line c, d, Fig. Je a diagram showing the electric connection and current-distribution of six baths in series connected to two unipolar dynamos in parallel, Fig. 5 is a view showing the electrical connections to the anode baskets and cathode plates; also means for removing the anode baskets from the carrying chains and removable cover for said baskets,

Patented itl-ay ill, tl.

Serial No. 349,350.

Fig. G illustrates the resilient means for pressing the rollers li'Lld, against the cathode plates.

ln the drawing represents the tank or vat, that contains the electrolyzing solution. Submerged in this bath are the baskets B which hold the tin scraps to be detinned. T he baskets are closed on all sides in order to hold the scraps more securely `.vhile passing through the bath. ln order to give the solution a good chance to get in close touch with each tin scrap, the walls of the baskets have to be made of perforated sheets or of screens, that allow' the solution to freely pass therethrough. The basket is attached to an I-sectioned endless band C in form ot a chain. lVithin the tank this endless chain is guided by rails F attached to the cover of the tank. which outside ot the tank assume the `form ot' channels. This guide F must be connected electrically land made ci conductive material to serve the purpose of conducting the electric current to the baskets, forming the anode. From some suitable place of these guide-rails F a cable connection goes to the positive pole of the machine, as indicated by G on Fig. l. The cathodes formerly arranged .in plates and suspended from rods into the bath are vac-` cording to my invention arranged in plates attached to an endless band H. The plates are marked D. on the drawings. This endless band H' is made in similar chain-like form as the one used for the basket, and also ot' conductive .metal to serve as conductor ot' the current and to connect the cathtides to one another. Within. the bath the chain is guided on rails K' that form the shape" of channel outside ot the bath.

Over this channel and outside of the bath f for an increased thickness of the tin on the cathodes as the latter return from' each submersion in the bath.

The guide-rails K should also be madeof conductive material and in continuous connection with one another, for they are to serve as a conductor for the electric current to the cathode-plates.

connected at some suitable place with the negative'pole of the dynamo indicated on the drawing by N. To impart the desired motion to the three endless chains carrying the baskets and the tivo rows of the cathodeplates, friction rollers have to be provided for these chains. In order to avoid a short `circuit between the anodes (baskets) and the cathodes (plates) care must be taken to have these rollers either made of insulating material or have them properly insulated `from the shaft, or to have these insulated lshafts and connected to one another by the belts or gear-wheels and are driven from an outside source of power, for instance, a's shown on the drawing, by means of a ybelt attached to a loose and, iiXed pulley-arrangement Q.

ln Fig. l six bath tanks A', A2, A3, At,

A5, AG are shown, and connected in series by cross connections R. These connections must bc arranged as shown 'in order to accomplish an even distribution of the current. The two dynamos of unipolar type T T are connected in parallel; such an arrangement for instance would suice for a current of 14 to 17 volts land 15,000 am- Vperes capacity.

An essential feature of my invention is the possibility oi disengaging the baskets as well as the cathode-plates from the end-- less chain. The cathode plates may be'disengaged as soon as the layer of tin is thick enough, and the layers may be scraped off or melted oil' as desired.

It must be mentioned that the scraps are placed into the baskets when the latter are .in the upright position, where the tin scraps can easily be packed into the baskets. Hereupon the baskets are closed With"a perforated coverand submerged into the electrolytic bath. When the baskets come out of the bath they are emptied When in their horizontalv position. It is understood of course that the process requires a certain' time for completely detinning the scraps and therefore it is evident that the baskets are submerged several times continuously scraps.

The rails are to be.

and brought out of the bath by theendless chain as long as there is a'ny tin left on the 'Of course the method can be varied in such manner that the chain does'not continuously rotate, but that the movement of the chain is stopped for a certain time and then is restarted. Naturally the movement ofthe baskets in the bath can be to and fro for a certain time and When the detinning has been completed the chain can be moved in such manner that the detinned baskets* come out of the bath.

The length of the single` bath may be about 30 meters, the Width of the bath about half a meter, the length and Width vof the baskets 35 centimeters, the length of the single cathode-plates may be the same as the,

length of the single baskets.

Having thus fully described the nature ofimy invention, what I desire to secure by LetterstPatent of the United States is 1. An apparatus for detinning tin-scraps, boxes or the likefin Aan electrolytic bath, comprising anodes and cathodes movable in a circuit into and out of the bath, and

baskets carried by the anodes for containing the articles to be detinned. 2. An apparatusfor detinning tin-scraps,

` boxes or the like in an electrolytic bath,`

comprising anodes and cathodes movable in a circuit into and out of the bath, baskets carried by the anodes for containing the articles to be dctinned, and means extraneous the bath arranged to engage and compress the spongy tin collected: on the cathodes.

3. An apparatus for detinning tin-scraps,-

boxes or the. like in an electrolytic bath, comprising anodes and cathodes v.movable in a circuit into and out of the bath, baskets carried by the anodes forcontaining the articles to be detinned, and adjustable means extraneous the'bath arranged to engage and compress the spongy tin collected on the cathodes.

4. Apparatus for detinning tin-scraps, boxes, or the like in an electrolytic alkaline bath, characterized'by cathode-plates continuously movable in a circuit'into and out of said bath, in combination with rollers for compressing the spongy tin.

5. Apparatus v for' detinning tin-scraps, boxes or the like in an electrolytic alkaline bath, characterized by cathode-plates and anodes continuously movable inD a circuit, 'in

combination With a mechanism for com" pressing the spongy tin, the mechanism being insulated.

6. Apparatus for detinning tin-scraps, boxes or the like in an electrolytic alkaline bath, characterized by cathode-plates and anodes continuously movable in a circuit and simultaneously into and out off said bath, in combination with a mechanism for lasagne compressing the spOng-y tin on the catliodesvr the part of the mechanism in direct connec' tion with 'the cathodeplates being constructed of non-conductive material.

7. An apparatus for cletinning tin scrap,1

boxes and the like, comprising an electrolytic alkaline bath, anode bearing baskets for holding said tin scrap, boxes and the like movable in a circuit, and a series of cathode plates also movable in a circuit simultaneously with the anode bearing baskets. l

o'. An apparatus for detinning tin scrap, boxes and the like7 comprising;l an electrol'vtic bath, anodes comprising said tin scrap7 boxes and the like` a series ol cathode plates movable in a circuit and into and out of said bath, and means `for compressing the niet/al deposited on the cathodes.

il. An apparatus lor detinning tin scrap, boxes and the like comprising an electrollvtic bath, :modes comprising said tin scrap, boxes and the like, and cathodes ear` ried by endless belts movable in unison in a circuit, said anodes and :athodes beingI immersed 'for a part of the circuit in said bath.

l0. An apparatus for detinning tin scrap, boxes and the like comprising an electrolvtie bath. anodes comprising said tin scrap, boxes and the like insertible in said bath, and eatllodes mounted on an endless belt movable in a circuit, said anodes and catliodes being immersed l'or a part of the eircuit in said bath. y

ll. An apparatus for detinning tinscraps, boxes or the like, comprising an electrolytic alkaline bath, anode bearing baskets made ot' perforated material Jfor holding;- said tin-scraps, boxes or the like movable in a circuit, and a series of cathode plates also movable in a circuit simultaneously with the anode-bearing baskets.

l2. Rin apparatus for detinning tinscraps, boxes or the like, comprising an eleetrolytic alkaline bath, a traveling carrier nimable in a circuit, anode-bearing baskets made of perforated material reniov ably attached to said carrier, and a series of cathode-plates also removably attached to the carrier and insulated from the anodebaskets.

13. in apparatus for detinning tiny scraps, boxes or the like, comprising an electrolytic alkaline bath, anode-bearing baskets made of perforated material for holding said tin-scraps,- boxes or the like movable in a circuit, said baskets having closures to cover openings in the baskets through which the material is placed, and a series of cathode-plates, also movablel in a circuit simultaneously with the anodebearingr baskets.

ll. An apparatus for detinning tinscraps, boxes or the like in an eleetrolytic alkaline bath, cathode-plates simultaneously movable in aeircuit into and out of said bath, and anode-baskets for containing said tin-scraps, boxes or the like insulated from said catliocles.

15. An apparatus for scraps, boxes and the like, comprising an electrolytic bath, anodes and cathodes movable in a circuit into and out of the bath and baskets carried by the anodes for containing the articlesto be detinned.

Vln witness ivliereot' l have hereunto set my hand in the presence of tivo witnesses. HJNS GOLDSCHMIDT, liitnesses:

lllotnmian Hatier, Hanni' llasriiu.

detinning tin 

